Second Hankel determinant for certain subclass of bi-univalent functions

Safa Salehian, Ahmad Motamednezhad


The main purpose of this paper is to obtain an upper bound for the second Hankel determinant  for  functions belonging to a subclass of  bi-univalent functions  in the open unit disk in the complex plane. Furthermore, the presented results  in this work improve or generalize the recent works of other authors.


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